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Computes the intersection of arrays


array_intersect

(PHP 4 >= 4.0.1, PHP 5)

array_intersectComputes the intersection of arrays

Description

array array_intersect ( array $array1 , array $array2 [, array $ ... ] )

array_intersect() returns an array containing all the values of array1 that are present in all the arguments. Note that keys are preserved.

Parameters

array1

The array with master values to check.

array2

An array to compare values against.

array

A variable list of arrays to compare.

Return Values

Returns an array containing all of the values in array1 whose values exist in all of the parameters.

Examples

Example #1 array_intersect() example

<?php
$array1 
= array("a" => "green""red""blue");
$array2 = array("b" => "green""yellow""red");
$result array_intersect($array1$array2);
print_r($result);
?>

The above example will output:

 Array (  [a] => green  [0] => red ) 

Notes

Note: Two elements are considered equal if and only if (string) $elem1 === (string) $elem2. In words: when the string representation is the same.

See Also



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